Analysis of information sources in references of the Wikipedia article "埃尔图鲁尔加齐" in Chinese language version.
Reliable information regarding Osman is scarce. His birth date is unknown and his symbolic significance as the father of the dynasty has encouraged the development of mythic tales regarding the ruler’s life and origins
No source provides a firm and factual recounting of the deeds of Osman's father.
The problem of Ottoman origins has preoccupied students of history, but because of both the absence of contemporary source materials and conflicting accounts written subsequent to the events there seems to be no basis for a definitive statement. The traditional account relates that the ancestor of the dynasty was one Gündüz Beg, leader of the Kayı tribe of Turcomans...
